1.1 本试验方法描述了一种试验方法，其中通过搅拌稀释条件下单片样品的腐蚀来测量均匀硅酸盐玻璃的溶解速率。 1.2 尽管试验方法是根据指南针对模拟核废料玻璃成分设计的 C1174年 ，该方法适用于用于其他应用的玻璃组合物，包括但不限于展示玻璃、药用玻璃、生物玻璃和容器玻璃组合物。 1.3 可以在低于100的温度下使用各种测试溶液 °C。虽然玻璃的耐久性可能会受到玻璃中溶解物质的影响，因此测试可以在稀释条件或浓缩条件下进行，以确定这些物质的影响。但必须注意避免、承认或解释可能混淆台阶高度测量的蚀变层的产生。 1.4 根据设计，本试验测得的溶解速率是试验期间发生的所有腐蚀的平均值。在稀释条件下，玻璃被假定为一致溶解，并且溶解速率被假定为恒定。 1.5 通过将单片样品放置在大体积混合良好的溶液中进行测试，从而获得高的体积与表面积比，从而在搅拌溶液的情况下产生稀释条件。 1.6 本试验方法不包括使用粉末玻璃样品或反应器溶液随时间饱和的试验方法。如果在测试前已知玻璃纤维的直径具有高精度，则可以在不戴口罩的情况下使用玻璃纤维。 1.7 试验可使用ASTM I型水进行（见规范 第1193天 和术语 第1129天 )、缓冲水或其他化学溶液、模拟或实际地下水、生物流体或其他溶解溶液。 1.8 测试是用至少有一个平面的单片玻璃样品进行的。尽管具有两个平面平行面有助于某些台阶高度的测量，但这不是必需的。不需要知道整料的几何尺寸。反应后对反应后的整体样品进行分析，以测量腐蚀深度，从而确定溶解速率。 1.9 可以使用放射性样本进行测试。然而，本试验方法并未涉及使用放射性核素的安全问题。 1.10 这些试验的数据可用于确定预测玻璃长期腐蚀行为所需的动力学速率模型参数的值。有关示例，请参见练习 1966年 ，第9.5节。 1.11 此测试方法必须按照数据验收的所有质量保证要求执行。 1.12 单位- 以国际单位制表示的数值被视为标准。括号中给出的任何值仅供参考。 1.13 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.14 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 ====意义和用途====== 5.1 该试验方法描述了搅拌反应器试样分析（SRCA）装置的设计，并确定了SRCA试验的性能方面以及试验结果的解释，这些方面必须由实验者解决，以对测量的溶解速率提供信心。 5.2 本试验方法中描述的SRCA方法可用于表征玻璃腐蚀的几个方面，这些方面可包括在玻璃（包括核废料玻璃）长期耐久性的机械模型中。 5.3 根据所研究的测试参数，SRCA结果可用于测量固有的稀释玻璃溶解速率，以及温度、pH和溶液化学等条件对溶解速率的影响。 5.4 由于该方法的可扩展性，它特别适用于研究玻璃成分对稀释条件腐蚀的影响。玻璃行为模型可以通过测试玻璃成分矩阵和建立定量的结构-性能关系来参数化。 5.5 腐蚀样品上存在的台阶高度可以通过多种技术测量，包括轮廓术（光学或触针）、原子力显微镜、干涉测量法或其他能够确定样品表面相对深度的技术。 还可以使用扫描电子显微镜等其他技术对样品进行询问，以表征腐蚀行为。这些进一步的分析可以确定样品是否均匀腐蚀，以及是否可能形成二次相或浸出层。这些特征的出现可能会影响玻璃溶解的准确性。此测试方法不涉及这些固态特性。

1.1 This test method describes a test method in which the dissolution rate of a homogenous silicate glass is measured through corrosion of monolithic samples in stirred dilute conditions. 1.2 Although the test method was designed for simulated nuclear waste glass compositions per Guide C1174 , the method is applicable to glass compositions for other applications including, but not limited to, display glass, pharmaceutical glass, bioglass, and container glass compositions. 1.3 Various test solutions can be used at temperatures less than 100 °C. While the durability of the glass can be impacted by dissolving species from the glass, and thus the test can be conducted in dilute conditions or concentrated condition to determine the impact of such species, care must be taken to avoid, acknowledge, or account for the production of alteration layers which may confound the step height measurements. 1.4 The dissolution rate measured by this test is, by design, an average of all corrosion that occurs during the test. In dilute conditions, glass is assumed to dissolve congruently and the dissolution rate is assumed to be constant. 1.5 Tests are carried out via the placement of the monolithic samples in a large well-mixed volume of solution, achieving a high volume to surface area ratio resulting in dilute conditions with agitation of the solution. 1.6 This test method excludes test methods using powdered glass samples, or in which the reactor solution saturates with time. Glass fibers may be used without a mask if the diameter is known to high accuracy before the test. 1.7 Tests may be conducted with ASTM Type I water (see Specification D1193 and Terminology D1129 ), buffered water or other chemical solutions, simulated or actual groundwaters, biofluids, or other dissolving solutions. 1.8 Tests are conducted with monolithic glass samples with at least a single flat face. Although having two plane-parallel faces is helpful for certain step height measurements, it is not required. The geometric dimensions of the monolith are not required to be known. The reacted monolithic sample is to be analyzed following the reaction to measure a corroded depth to determine dissolution rate. 1.9 Tests may be performed with radioactive samples. However, safety concerns working with radionuclides are not addressed in this test method. 1.10 Data from these tests can be used to determine the value of kinetic rate model parameters needed to predict glass corrosion behavior over long periods of time. For an example, see Practice C1662 , section 9.5. 1.11 This test method must be performed in accordance with all quality assurance requirements for acceptance of the data. 1.12 Units— The values stated in SI units are regarded as the standard. Any values given in parentheses are for information only. 1.13 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.14 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee. ====== Significance And Use ====== 5.1 This test method provides a description of the design of the Stirred Reactor Coupon Analysis (SRCA) apparatus and identifies aspects of the performance of the SRCA tests and interpretation of the test results that must be addressed by the experimenter to provide confidence in the measured dissolution rate. 5.2 The SRCA methods described in this test method can be used to characterize several aspects of glass corrosion that can be included in mechanistic models of long-term durability of glasses, including nuclear waste glasses. 5.3 Depending on the test parameters investigated, the SRCA results can be used to measure the intrinsic dilute glass dissolution rate, as well as the effects of conditions such as temperature, pH, and solution chemistry on the dissolution rate. 5.4 Due to the scalable nature of the method, it is particularly applicable to studies of the impact of glass composition on dilute-condition corrosion. Models of glass behavior can be parameterized by testing glass composition matrices and establishing quantitative structure-property relationships. 5.5 The step heights present on the corroded sample can be measured by a variety of techniques including profilometry (optical or stylus), atomic force microscopy, interferometry or other techniques capable of determining relative depths on a sample surface. The sample can also be interrogated with other techniques such as scanning electron microscopy to characterize the corrosion behavior. These further analyses can determine if the sample corroded homogenously and possible formation of secondary phases or leached layers. Occurrence of these features may impact the accuracy of glass dissolution. This test method does not address these solid-state characterizations.